Inventories

6 Months Ended

Jun. 30, 2023

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventories consisted of the following:

(in thousands)	June 30, 2023			December 31, 2022
Raw materials	$	22,833		$	19,774
Work in process		10,086			7,183
Finished goods		2,235			2,436
Obsolescence allowance		(3,326	)		(2,867	)
Total inventories	$	31,828		$	26,526

Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $0.4 million and $(0.1) million for the three months ended June 30, 2023 and 2022, respectively, and $0.6 million and $0.1 million for the six months ended June 30, 2023 and 2022, respectively.